US Patent 9141983 Shared data sets combined with user-specific purchased data sets

Methods and systems are described for shared data sets combined with purchased data sets in an on-line services environment. In one embodiment, a method includes, identifying a user, associating the user with data in a shared database, and receiving a purchased dataset from the identified user. The method further includes adding the purchased dataset to a delta table associated with the shared database based on determined record relationships and field relationship, and providing access to the purchased dataset to the user through requests for data in the shared database.